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  Our Catalog   Hydraulics, Pneumatics & Plumbing   Valves   Relief Valves

Relief Valves - 520 - Blowout Sale! Save up to 71%


Blowout Sale! Up to 71% off on Relief Valves at In The National Interest. Top brands include Apollo Valve, Midwest Control, clippard, Taco, Kingston Valves, National Brand Alternative, Hilitand, Honeywell, Sellerocity, Control Devices, Rheem, & Reliance. Hurry! Limited time offers. Offers valid only while supplies last.



Apollo Valve 10-400 Series Bronze Safety Relief Valve, ASME Hot Water, 30 psi Set Pressure, 3/4'' NPT Male x Female
Apollo Valve 10-400 Series Bronze Safety Relief Valve, ASME Hot Water, 30 psi Set Pressure, 3/4" NPT Male x Female
By Apollo Valve
In Stock
$21.93
$16.72
You Save: 24%

mpn: 1040705, ean: 0670750493164,

This Apollo Valve 10-400 series safety relief valve has a bronze body, a 30 pounds per square inch (psi) relief pressure, a 3/4" male National Pipe Thread (NPT) inlet connection, and a 3/4" female NPT outlet. The valve's body and nozzle are bronze fo...


Midwest Control ST25-40 ASME Soft Seat Safety Valve, 40 psi, 1/4'' NPT, All Brass Construction, 250 Degree F Max Temperature
Midwest Control ST25-40 ASME Soft Seat Safety Valve, 40 psi, 1/4" NPT, All Brass Construction, 250 Degree F Max Temperature
By Midwest Control
In Stock
$13.23

mpn: ST25-40,

Ideal for Small Air Compressors and Other Related Applications that Require a Compact Safety Valve, Set Pressure Tolerances: ± 3% of Set Pressure, Maximum Temperature: 250°F, Construction: All Brass With Zinc Plated Music Wire Spring, Resilient Sil...


Clippard JEV-F2F2 J-Series Quick Exhaust Valve, 90 Degree Orientation, 1/8'' NPT Female Thread
Clippard JEV-F2F2 J-Series Quick Exhaust Valve, 90 Degree Orientation, 1/8" NPT Female Thread
By clippard
In Stock
$22.69
$21.56
You Save: 5%

mpn: JEV-F2F2,

Clippard’s J-Series Exhaust Valve offers a variety of design features and provides fast response times and high flow with 1/8” and 1/4” NPT ports. This compact poppet type valve is constructed of brass and is100% tested to assure the highest qu...


Taco 334-T3 Boiler Feed Valve, Pressure Reducing Valve
Taco 334-T3 Boiler Feed Valve, Pressure Reducing Valve
By Taco
In Stock
$171.50
$73.32
You Save: 57%

mpn: 334-T3, ean: 0687752022308,

Taco 334-T3 is a combination Boiler Feed Valve and Pressure Relief Valve. Features cast iron body and 1/2" threaded inlets.This boiler feed valve combination is used to automatically feed water to a system whenever the pressure in the system drops be...


Midwest Control SRV187-25-NC10 Non Code Soft Seat Safety Valve, 10 psi, -65 Degree F - 400 Degree F Temperature Range, 1/4''
Midwest Control SRV187-25-NC10 Non Code Soft Seat Safety Valve, 10 psi, -65 Degree F - 400 Degree F Temperature Range, 1/4"
By Midwest Control
In Stock
$11.26

mpn: SRV187-25-NC10,

Applications: Non Code Compact Size Low Flow Requirements, Temperature Range: -65°F to 400°F, Construction: Seat Cap and Piston C360 Brass (ASTM B-16), 302 Stainless Steel Spring and 440 Stainless Steel Ball, No Audible Leak at 45% Set Pressure at ...


Midwest Control SRV38-160 ASME Soft Seat Safety Valve, 160 psi, -65 Degree F - 400 Degree F Temperature Range, 3/8''
Midwest Control SRV38-160 ASME Soft Seat Safety Valve, 160 psi, -65 Degree F - 400 Degree F Temperature Range, 3/8"
By Midwest Control
In Stock
$13.23

mpn: SRV38-160,

Applications: Small Air Compressors with High Flow Requirements, Set Pressure Tolerances: ± 3% of Set Pressure, Temperature Range: -65°F to 400°F, Construction: Seat Cap and Piston C360 Brass (ASTM B-16), 17-7 Stainless Steel Spring and Silicone S...


Kingston 112CSS Series Brass ASME-Code Safety Valve, 30 psi Set Pressure, 1/4'' NPT Male
Kingston 112CSS Series Brass ASME-Code Safety Valve, 30 psi Set Pressure, 1/4" NPT Male
By Kingston Valves
In Stock
$16.47

mpn: 112CSS-2-030,

The Kingston Model 112CSS Safety Valve is an ASME Code Certified, precision machined brass valve with a hard seat. This valve supports ASME Code applications up to 300 psi. It also features a stainless steel ball for durability and a pull ring for ma...


Apollo Valve 10-600 Series Bronze Safety Relief Valve, ASME Hot Water, 75 psi Set Pressure, 3/4'' NPT Female
Apollo Valve 10-600 Series Bronze Safety Relief Valve, ASME Hot Water, 75 psi Set Pressure, 3/4" NPT Female
By Apollo Valve
SKU: #A0063300
In Stock
$35.81

sku: A0063300, mpn: 1060415, ean: 0670750878459,

This Apollo Valve 10-600 series hot water relief valve protects against excessive water pressure due to failure of controls to regulate BTU input. It has a bronze body, a 75 pounds per square inch (psi) relief pressure, and a 3/4" female National Pip...


NATIONAL BRAND ALTERNATIVE 521015 75 lb Pressure Relief Valve, 3/4''
NATIONAL BRAND ALTERNATIVE 521015 75 lb Pressure Relief Valve, 3/4"
By National Brand Alternative
In Stock
$11.24
$3.22
You Save: 71%

mpn: 521015, ean: 0076335040219,

Warning:  do not use this product with water systems that convey or dispense water for human consumption. Heavy duty brass for shallow, deep well and submersible pumps. Spring loaded and set under pressure at 75 Lbs. Field adjustable +25 Lbs.Heavy d...


DN15 Brass Adjustable Water Pressure Regulator Reducer with Gauge Meter Combo for RV Camper - Protect RV Plumbing and Hoses from High-Pressure City Water
DN15 Brass Adjustable Water Pressure Regulator Reducer with Gauge Meter Combo for RV Camper - Protect RV Plumbing and Hoses from High-Pressure City Water
By Hilitand
In Stock
$19.79

mpn: Hilitandevm1w4yrk7, ean: 0763741643072,

Specifications: Material: brass Maximum range: 16 kg/cm² Water pressure: 0.05-0.8Mpa (7.25-116psi) Valve body length: 67mm / 2.64in Height: 90mm / 3.54in Connector: DN15 20mm Inlet/outlet thread depth: 16mm Inlet pressure: 1.6Mpa (Max) / 232...


Honeywell - V800A1070 - Gas Valve, Standard Opening, 250, 000 BtuH
Honeywell - V800A1070 - Gas Valve, Standard Opening, 250, 000 BtuH
By Honeywell
In Stock
$354.10
$344.92
You Save: 3%

mpn: V800A1070, ean: 0085267000703,

Gas Valve Ignition Type Standing Pilot BtuH Capacity 250 000 Valve Type Standard Opening Coil Volts 24 Gas Type NG/LP Inlet Size 1/2 In. Outlet Size 3/4 In. LP Conversion Kit Yes Side Taps Yes Inlet Pressure Tap Yes Reducer Bushing Kit 3/4 x 1/2 In. ...


Apollo Valve 13-213 Series Bronze Safety Relief Valve, ASME Steam, 15 psi Set Pressure, 1-1/4'' x 1-1/2'' NPT Male x Female
Apollo Valve 13-213 Series Bronze Safety Relief Valve, ASME Steam, 15 psi Set Pressure, 1-1/4" x 1-1/2" NPT Male x Female
By Apollo Valve
In Stock
$113.57
$57.00
You Save: 50%

mpn: 13213B15, ean: 0670750221118,

This Apollo Valve 13-213 series steam relief valve is a safety valve for protecting small to medium low-pressure steam heating boilers. It has a cast bronze body, a 15 pounds per square inch (psi) relief pressure, a 1-1/4" male National Pipe Thread (...


Sellerocity Kit Pop Off Safety Relief Valve Replaces Campbell Hausfeld V-215109AV W/ ProPlus Tape
Sellerocity Kit Pop Off Safety Relief Valve Replaces Campbell Hausfeld V-215109AV W/ ProPlus Tape
By Sellerocity
In Stock
$13.87

mpn: 75141~, ean: 0689003325633,

Sellerocity Pop Off Safety Relief Valve Replaces Campbell Hausfeld V-215109AVThis Custom Bundle includes a Midwest Control's sourced valve & ProPlus 3MM teflon tape. Ships From Sellerocity Sales In Sarasota, Florida. One roll of tape per order. ...


Midwest Control SRV18-215 ASME Soft Seat Safety Valve, 215 psi, -65 Degree F - 400 Degree F Temperature Range, 1/8''
Midwest Control SRV18-215 ASME Soft Seat Safety Valve, 215 psi, -65 Degree F - 400 Degree F Temperature Range, 1/8"
By Midwest Control
In Stock
$13.00

mpn: SRV18-215,

Applications: Small Air Compressors with High Flow Requirements, Set Pressure Tolerances: ± 3% of Set Pressure, Temperature Range: -65°F to 400°F, Construction: Seat Cap and Piston C360 Brass (ASTM B-16), 17-7 Stainless Steel Spring and Silicone S...


Apollo Valve 10-400 Series Bronze Safety Relief Valve, ASME Hot Water, 50 psi Set Pressure, 3/4'' NPT Female
Apollo Valve 10-400 Series Bronze Safety Relief Valve, ASME Hot Water, 50 psi Set Pressure, 3/4" NPT Female
By Apollo Valve
In Stock
$22.58
$20.83
You Save: 8%

mpn: 1041810, ean: 0670750070785,

This Apollo Valve 10-400 series safety relief valve has a bronze body, a 50 pounds per square inch (psi) relief pressure, a 3/4" female National Pipe Thread (NPT) inlet connection, and a 3/4" female NPT outlet. The valve's body and nozzle are bronze ...


Control Devices SN50-1A050 SN Series Brass Hard Seat ASME Safety Valve, 50 psi Set Pressure, 1/2 Male NPT
Control Devices SN50-1A050 SN Series Brass Hard Seat ASME Safety Valve, 50 psi Set Pressure, 1/2 Male NPT
By Control Devices
In Stock
$22.69
$18.97
You Save: 16%

mpn: SN50-1A050,

This Control Devices SN50-1A050 ASME safety valve has a brass body, a 50 psi relief pressure, a 1/2 inch male NPT threaded inlet connection, and a stainless steel pull ring for manual pressure relief. The valve's brass body, brass valve seat, and the...


Rheem SP623335 Water Heater Vacuum Relief Valve
Rheem SP623335 Water Heater Vacuum Relief Valve
By Rheem
SKU: #20418
In Stock
$39.42

sku: 20418, mpn: SP623335, ean: 0020352595054,

Rheem SP623335 Water Heater Vacuum Relief ValveVacuum Relief Valve. ...


Midwest Control ST25-115 ASME Soft Seat Safety Valve, 115 psi, 1/4'' NPT, All Brass Construction, 250 Degree F Max Temperature
Midwest Control ST25-115 ASME Soft Seat Safety Valve, 115 psi, 1/4" NPT, All Brass Construction, 250 Degree F Max Temperature
By Midwest Control
In Stock
$13.23

mpn: ST25-115,

Ideal for Small Air Compressors and Other Related Applications that Require a Compact Safety Valve, Set Pressure Tolerances: ± 3% of Set Pressure, Maximum Temperature: 250°F, Construction: All Brass With Zinc Plated Music Wire Spring, Resilient Sil...


Midwest Control SRV187-25-NC05 Non Code Soft Seat Safety Valve, 5 psi, -65 Degree F - 400 Degree F Temperature Range, 1/4''
Midwest Control SRV187-25-NC05 Non Code Soft Seat Safety Valve, 5 psi, -65 Degree F - 400 Degree F Temperature Range, 1/4"
By Midwest Control
In Stock
$11.26

mpn: SRV187-25-NC05,

Applications: Non Code Compact Size Low Flow Requirements, Temperature Range: -65°F to 400°F, Construction: Seat Cap and Piston C360 Brass (ASTM B-16), 302 Stainless Steel Spring and 440 Stainless Steel Ball, No Audible Leak at 45% Set Pressure at ...


Reliance 9001583-045 2-1/2-Inch Shank Water Heater Temperature and Pressure Relief Valve
Reliance 9001583-045 2-1/2-Inch Shank Water Heater Temperature and Pressure Relief Valve
By Reliance
In Stock
$21.99
$11.99
You Save: 45%

mpn: 0100108-601, ean: 0020363105655,

Reliance Water Heater Co 9001583-045 2-1/2" Shank Water Heater Temperature & Pressure Relief Valve. For use with water heater models requiring a 2 1/2" shank. Heavy duty Brass construction.Temperature and pressure relief valve. For use with water hea...



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